3ecoTEC exclusive installation and maintenance instructions / 0020017768_041 Notes on the documentationThe following information is intended to help youthroughout the entire documentation.Further documents apply in combination with this instal-lation and maintenance manual.We accept no liability for any damage caused by fail-ure to observe these instructions.Other applicable documentsFor the owner of the system:Operating manual no. 838402Brief operating instructions no. 838404Warranty card no. 0020055745Assembly manual for flue accessories no. 8344491.1 Storage of the documentsPlease pass on this operating and installation manualand all other valid documents to the operator of the in-stallation in order for him or her to store it so that it isavailable whenever it is required.1.2 Safety instructions and symbolsPlease observe the safety instructions in this manual forthe installation of the appliance.The symbols used in the manual are explained below:d Danger!Immediate danger to life and limb!e Danger!Risk of death from electric shock!H Danger!Risk of burns or scalding!a Caution!Potentially dangerous situation for the productand environment!h Note!Useful information and instructions.• Symbol for a necessary task1.3 Validity of the manualThis installation manual applies exclusively to units withthe following part numbers:– 0010002668– 0010002669The part number of the unit can be obtained from theidentification plate.ContentsNotes on the documentation 110 Replacing components ..................................... 4510.1 Safety instructions ................................................... 4510.2 Replacing burner ....................................................... 4510.3 Replacing fan or gas fittings .................................. 4610.4 Replacing primary heat exchanger ...................... 4610.5 Replacing electronics and display ........................ 4711 Vaillant service ................................................. 4712 Recycling and disposal ..................................... 4713 Technical data ................................................... 48AppendixEC declaration of conformity ............................................. 49Benchmark gas boiler commissioning checklist ............ 51